[gnome-shell] messageTray: Fix accidental typo

[Jasper St. Pierre <jstpierre src gnome org>]

commit c99afed012eedf418f1a6ab09390003d46fa9468
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Fri Oct 7 16:22:08 2011 -0400

    messageTray: Fix accidental typo

 js/ui/messageTray.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index 863930b..fa7efc2 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -1585,7 +1585,7 @@ MessageTray.prototype = {
 
         summaryItemToRemove.actor.destroy();
 
-        if (needUpdate);
+        if (needUpdate)
             this._updateState();
     },